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- W1964444312 abstract "Histamine is known to excite a subset of C-fibers and cause itch sensation. Despite its well-defined excitatory action on sensory neurons, intracellular signaling mechanisms are not understood. Previously, we demonstrated that bradykinin excited sensory neurons by activating TRPV1 via the phospholipase A(2) (PLA(2)) and lipoxygenase (LO) pathway. We, thus, hypothesized that histamine excited sensory neurons via the PLA(2)/LO/TRPV1 pathway. Application of histamine elicited a rapid increase in intracellular Ca(2+) ([Ca(2+)](i)) that desensitized slowly in cultured dorsal root ganglion neurons. Histamine-induced [Ca(2+)](i) was dependent on extracellular Ca(2+) and inhibited by capsazepine and by SC0030, competitive antagonists of TRPV1. Quinacrine and nordihydroguaiaretic acid, a PLA(2) and an LO inhibitor, respectively, blocked the histamine-induced Ca(2+) influx in sensory neurons, while indomethacin (a cyclooxygenase inhibitor) did not. We thus conclude that histamine activates TRPV1 after stimulating the PLA(2)/LO pathway, leading to the excitation of sensory neurons. These results further provide an idea for potential use of TRPV1 antagonists as anti-itch drugs." @default.
- W1964444312 created "2016-06-24" @default.
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- W1964444312 date "2004-05-01" @default.
- W1964444312 modified "2023-10-01" @default.
- W1964444312 title "Histamine-induced Ca2+ influx via the PLA2/lipoxygenase/TRPV1 pathway in rat sensory neurons" @default.
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- W1964444312 doi "https://doi.org/10.1016/j.neulet.2004.01.019" @default.
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